keel
noun [ C ] uk/kiːl/ us/kiːl/
（船的）龙骨
the long piece of wood or metal along the bottom of a boat that forms part of its structure and helps to keep the boat balanced in the water
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。